But the news should come as no surprise. In 2010, while promoting his comedy Due Date, Downey predicted he'd have another kid in 2012.

"I think I will be wrist-deep in doo-doo within 18 months. I'm calling it right here," he said.

And he was thinking pink.

"I think we should probably try to have a girl because I don't want another male entity to have to compete," he said. "I don't want Indio to feel there's another boy in my life. But I don't know what we'd have to do [to have a girl]. Do we have to put it in a spoon and hang it upside-down?"